Re: [RE-wrenches] Fronius replacement

2012-08-28 Thread Gary Willett 

JESSE:

The Power-One specs lists 160V to 530V as the MPPT working range. It's 
possible to set the per MPPT input as low as 120VDC. Power-One does not 
provide info for loss of efficiency if the high-temp DC in[put voltage 
drops below 160V.


Do you have any info on performance degradation between 120V and 160V?

Regards,


Gary Willett, PE


On 8/28/2012 11:31 AM, mac Lewis wrote:
Power One Inverters will easily string that low.  We have used quite a 
few of these with no problem.  They are ungrounded on the DC side.


On Mon, Aug 27, 2012 at 3:22 PM, Jesse Dahl > wrote:


I think some Solectria inverters have a low number (115vdc). The
Solectrias I have worked with had a max DC voltage of 400vdc though.

Jesse

Sent from my iPhone

On Aug 27, 2012, at 4:13 PM, David Brearley
mailto:david.brear...@solarprofessional.com>> wrote:


Off the top of my head...Power-One?

You can download an Excel file with comprehensive string inverter
specs here:

http://solarprofessional.com/webexclusive/



On Aug 27, 2012, at 4:06 PM, William Miller wrote:


Friends:

We have a client that wants to divest of 8 Fronius LG-4500 LV
inverters.  They are experiencing a high number of failures.
  The Fronius have an unusually low DC input window:  150 to 450
VDC.  This means the stringing will result in a lower voltages
than typically found and makes it difficult to substitute
inverters.  Does anyone know of any reliable inverter that will
work with string voltages in the low 200s?

Thanks in advance.

William Miller


Miller Solar
Voice :805-438-5600 
email: will...@millersolar.com 
http://millersolar.com
License No. C-10-773985

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Re: [RE-wrenches] Fronius replacement

2012-08-28 Thread mac Lewis 
Power One Inverters will easily string that low.  We have used quite a few
of these with no problem.  They are ungrounded on the DC side.

On Mon, Aug 27, 2012 at 3:22 PM, Jesse Dahl  wrote:

> I think some Solectria inverters have a low number (115vdc). The
> Solectrias I have worked with had a max DC voltage of 400vdc though.
>
> Jesse
>
> Sent from my iPhone
>
> On Aug 27, 2012, at 4:13 PM, David Brearley <
> david.brear...@solarprofessional.com> wrote:
>
> Off the top of my head...Power-One?
>
> You can download an Excel file with comprehensive string inverter specs
> here:
>
> http://solarprofessional.com/webexclusive/
>
>
>
> On Aug 27, 2012, at 4:06 PM, William Miller wrote:
>
> Friends:
>
> We have a client that wants to divest of 8 Fronius LG-4500 LV inverters.
>  They are experiencing a high number of failures.   The Fronius have an
> unusually low DC input window:  150 to 450 VDC.  This means the stringing
> will result in a lower voltages than typically found and makes it difficult
> to substitute inverters.  Does anyone know of any reliable inverter that
> will work with string voltages in the low 200s?
>
> Thanks in advance.
>
> William Miller
>
>
> Miller Solar
> Voice :805-438-5600
> email: will...@millersolar.com
> http://millersolar.com
> License No. C-10-773985
>
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-- 



Mac Lewis

*

"Yo solo sé que no sé nada." -Sócrates
*
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Re: [RE-wrenches] Fronius replacement

2012-08-27 Thread Jesse Dahl 
I think some Solectria inverters have a low number (115vdc). The Solectrias I 
have worked with had a max DC voltage of 400vdc though.

Jesse

Sent from my iPhone

On Aug 27, 2012, at 4:13 PM, David Brearley 
 wrote:

> Off the top of my head...Power-One?
> 
> You can download an Excel file with comprehensive string inverter specs here:
> 
> http://solarprofessional.com/webexclusive/
> 
> 
> 
> On Aug 27, 2012, at 4:06 PM, William Miller wrote:
> 
>> Friends:
>> 
>> We have a client that wants to divest of 8 Fronius LG-4500 LV inverters.  
>> They are experiencing a high number of failures.   The Fronius have an 
>> unusually low DC input window:  150 to 450 VDC.  This means the stringing 
>> will result in a lower voltages than typically found and makes it difficult 
>> to substitute inverters.  Does anyone know of any reliable inverter that 
>> will work with string voltages in the low 200s?
>> 
>> Thanks in advance.
>> 
>> William Miller
>> 
>> 
>> Miller Solar
>> Voice :805-438-5600
>> email: will...@millersolar.com
>> http://millersolar.com
>> License No. C-10-773985
>> 
>> ___
>> List sponsored by Home Power magazine
>> 
>> List Address: RE-wrenches@lists.re-wrenches.org
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>> Options & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
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Re: [RE-wrenches] Fronius replacement

2012-08-27 Thread David Brearley 
Off the top of my head...Power-One?

You can download an Excel file with comprehensive string inverter specs here:

http://solarprofessional.com/webexclusive/



On Aug 27, 2012, at 4:06 PM, William Miller wrote:

> Friends:
> 
> We have a client that wants to divest of 8 Fronius LG-4500 LV inverters.  
> They are experiencing a high number of failures.   The Fronius have an 
> unusually low DC input window:  150 to 450 VDC.  This means the stringing 
> will result in a lower voltages than typically found and makes it difficult 
> to substitute inverters.  Does anyone know of any reliable inverter that will 
> work with string voltages in the low 200s?
> 
> Thanks in advance.
> 
> William Miller
> 
> 
> Miller Solar
> Voice :805-438-5600
> email: will...@millersolar.com
> http://millersolar.com
> License No. C-10-773985
> 
> ___
> List sponsored by Home Power magazine
> 
> List Address: RE-wrenches@lists.re-wrenches.org
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> 
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> 
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